cherry-pick(#6199): Fix stacked plots legend

[shefalijoshi]

Issue #6176 #6158 #6209 #6231 #6159 #6176

• Add listeners to remove stacked plot series and make keys unique

• don't add overlay plots to stacked plot legends

• Ensure series colors are drawn correctly in the plot legend

• Remove legend from mct plot. Remove series reactivity from stackd plot and add them to the legend instead.

• Clean up stacked plots so that the plot legend needs fewer props Also make sure that plot selection inside a stacked plot works - this had regressed due to plot annotations

• Fix console error in plot elements pool and plot legend - reset arrays to empty

• Ensure color in the y axis swatch updates correctly

• Fix small issues with removing objects from STacked plots

• Fix selection for annotations and also select stacked plot child items

• fix notebook tagging

• remove unused annotation editor and change selection to single object

• remove reference to deleted css

• fix e2e tests

• Fix small typos into the selection context for Notebooks.

• Add a typ that identifies that an annotation selection is coming from a search result

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Co-authored-by: Scott Bell scott@traclabs.com

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Codecov Report

❗ No coverage uploaded for pull request base (release/2.1.6@dda6800). Click here to learn what that means.
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@@               Coverage Diff                @@
##             release/2.1.6    #6247   +/-   ##
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  Hits                     ?    14343           
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Flag	Coverage Δ		*Carryforward flag
e2e-ci	39.49% <0.00%> (?)		Carriedforward from 8847c86
e2e-full	51.23% <0.00%> (?)		Carriedforward from 8847c86
e2e-stable	53.91% <0.00%> (?)
unit	49.71% <0.00%> (?)		Carriedforward from 8847c86

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